I have a dataset that includes errors commited by about 90 different vendors over the past 2 years. There is a field, ErrorType, that contains 1 of 3 variables for every row of data. I want to consolidate ErrorType into a stacked bar, which shows the number (and in a different chart, the percentage) of each ErrorType per month, per vendor creating the error. But I'm brand new to this critter and cannot intuit how to make that happen.

I could do this in seconds in Excel, but I cannot figure this out in Qlik.